Highlights

• There will be a Release Candidate soon
  • See #11406 for a list of outstanding items
• new URL("...", import.meta.url) is treated as dependency and creates an asset module
• Worker support
  • new Worker(new URL("...", import.meta.url)) creates a WebWorker (same for new SharedWorker)
    • known issue: type: "module" doesn't work yet
  • navigator.serviceWorker.register(new URL("...", import.meta.url)) creates a ServiceWorker
• Improved target
  • target option allows versions, e. g. target: "node10.13" or target: "es2020"
  • target allows an array of targets, e. g. target: ["web", "es2020"]

Features

• Stats improvements
  • Group assets and modules in stats text output by default to keep within space limit
  • asset modules are enabled by default (type: "asset")
  • Put name, version, time, errors/warnings and hash in a single line as summary in the stats
• Use output.wasmLoading (and output.workerWasmLoading) to specify the wasm loading method (similar to output.chunkLoading)
• New option externalsPreset with presets for externals for
  • node
  • nwjs (deprecated)
  • electronMain
  • electronPreload
  • electronRenderer
  • web
  • webAsync
  • defaults choosen based on targets
• mjs experiment is enabled by default
  • .mjs and .js with type: "module" in package.json puts ESM in strict mode
    • no CommonJs allowed
    • extensions are required in imports
    • no named exports of non-esm modules
    • no __esModule support (will be added once this landed in node.js)
  • .cjs and .js with type: "commonjs" in package.json disables ESM support
  • .wasm with type: "module" in package.json also makes extensions required in wasm imports
• output.ecmaVersion is replaced with output.environment which lists features used by webpack

Changes

• Stats improvements
  • Hide hash by default in stats
  • Hide entrypoints in stats by default when unnecessary
  • Show only files count in entrypoints when there are too many files
  • Hide auxiliary files for entrypoints in stats by default

Bugfixes

• improve ASI handling to avoid Object(...) wrapping
• fix incorrect disposing of modules when a whole chunk is removed during Hot Module Replacement